Graphics.PageScale Property

private void ChangePageScaleAndTranslateTransform(PaintEventArgs e)
{

    // Create a rectangle.
    Rectangle rectangle1 = new Rectangle(20, 20, 50, 100);

    // Draw its outline.
    e.Graphics.DrawRectangle(Pens.SlateBlue, rectangle1);

    // Change the page scale.  
    e.Graphics.PageScale = 2.0F;

    // Call TranslateTransform to change the origin of the 
    //  Graphics object.
    e.Graphics.TranslateTransform(10.0F, 10.0F);

    // Draw the rectangle again.
    e.Graphics.DrawRectangle(Pens.Tomato, rectangle1);

    // Set the page scale and origin back to their original values.
    e.Graphics.PageScale = 1.0F;
    e.Graphics.ResetTransform();

    SolidBrush transparentBrush = new SolidBrush(Color.FromArgb(50,
        Color.Yellow));

    // Create a new rectangle with the coordinates you expect 
    // after setting PageScale and calling TranslateTransform: 
    // x = (10 + 20) * 2 
    // y = (10 + 20) * 2 
    // Width = 50 * 2 
    // Length = 100 * 2
    Rectangle newRectangle = new Rectangle(60, 60, 100, 200);

    // Fill in the rectangle with a semi-transparent color.
    e.Graphics.FillRectangle(transparentBrush, newRectangle);
}